The only known atom that does not contain a neutron is one of the isotopes of hydrogen. The mass number, symbolized as "A" in the text, of this hydrogen isotope must be:

The only known atom that does not contain a neutron is one of the isotopes of hydrogen. The mass number, symbolized as "A" in the text, of this hydrogen isotope must be:




A) 1.01
B) 0
C) 1
D) 2
E) none of the above



Answer: C


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